DETECTION OF REVERSION BASED ON MASS AIR FLOW SENSOR READINGS

摘要

An engine system includes a mass air flow sensor and a manifold absolute pressure sensor configured to provide a real-time MAP signal during an event. The mass air flow sensor is configured to generate a set of mass air flow readings based on an airflow through the mass air flow sensor during the event. The set of mass air flow readings have a maximum value and a minimum value. A controller is configured to execute a method for detecting reversion in the air flow. If the rate of change in the real-time MAP signal is less than the predetermined transient threshold value (T0), the method includes setting a delta factor (D) as the difference between the maximum value and the minimum value. Reversion is detected based at least partially on a magnitude of the delta factor (D).

主权项

1. An engine system comprising:
a manifold absolute pressure sensor configured to provide a real-time MAP signal during an event; a mass air flow sensor configured to generate a set of mass air flow readings based on an airflow through the mass air flow sensor during the event, the set of mass air flow readings having a maximum value and a minimum value; and a controller operatively connected to the mass air flow sensor and the manifold absolute pressure sensor and having a processor and tangible, non-transitory memory on which is recorded instructions for executing a method for detecting reversion in the airflow; wherein execution of the instructions by the processor causes the controller to:
determine whether a rate of change in the real-time MAP signal is greater than or equal to a predetermined transient threshold value (T0);if the change in the real-time MAP signal is less than the predetermined transient threshold value (T0), set a delta factor (D) as the difference between the maximum value and the minimum value of the set of mass air flow readings; anddetect the reversion based at least partially on a magnitude of the delta factor (D).